scholarly journals Design and Simulation of Linear All-Optical Comparator Based on Square-Lattice Photonic Crystals

2021 ◽  
Author(s):  
Fariborz Parandin ◽  
Reza Kamarian ◽  
Mohamadreza Jomour
Keyword(s):  
Photonic Crystals ◽  
Integrated Circuits ◽  
Photonic Integrated Circuits ◽  
Optical Power ◽  
Logic Circuits ◽  
Logic Circuit ◽  
Square Lattice ◽  
Refractive Indices ◽  
Long Distance ◽  
All Optical

Abstract An optical comparator is an important logic circuit used in digital designs. Photonic crystals are among the platforms for implementing different kinds of gates and logic circuits. Photonic crystals are structures with alternating refractive indices. In digital optics, logical values “0” and “1” are defined based on the level of optical power. In this paper, an optical comparator based on square-lattice photonic crystals is designed and simulated. In the design of this comparator, a small-sized structure is used. The simulation results show that in the proposed comparator, there is a long distance between logical values ​​“0” and “1”. Due to the small size of this comparator and the adequate distance between logical values ​​“0” and “1”, this structure suits photonic integrated circuits with high accuracy.

Design of All-optical Half-subtractor Circuit Device using 2-D Principle of Photonic Crystal Waveguides

2019 ◽  
Vol 40 (3) ◽  
pp. 195-203 ◽  
Author(s):  
Sandip Swarnakar ◽  
Santosh Kumar ◽  
Sandeep Sharma
Keyword(s):  
Photonic Crystal ◽  
Integrated Circuits ◽  
Finite Difference Time Domain ◽  
Optical Amplifiers ◽  
Photonic Integrated Circuits ◽  
Square Lattice ◽  
Photonic Crystal Waveguides ◽  
Nonlinear Materials ◽  
All Optical ◽  
Difference Time

Abstract A design of all-optical half-subtractor (AOHS) is presented based on two-dimensional (2-D) photonic crystal (PhC) waveguides without using optical amplifiers and nonlinear materials. It is an essential component of various photonic integrated circuits. The design of AOHS circuit is based on beam interference principle, using square lattice of Y-shaped and T-shaped waveguides with silicon dielectric rods in air substrate. It is validated through finite-difference time-domain and using MATLAB simulations.

scholarly journals Design and Simulation of a Very Fast and Compact All-Optical Full-Subtractor Based an Nonlinear Effect in 2D Photonic Crystals

2021 ◽  
Author(s):  
Reza Beiranvand ◽  
Ali Mir ◽  
Reza Talebzadeh
Keyword(s):  
Refractive Index ◽  
Photonic Crystals ◽  
Integrated Circuits ◽  
Square Lattice ◽  
Optical Integrated Circuits ◽  
All Optical ◽  
Non Linear ◽  
Linear Material ◽  
Silicon Rods ◽  
Doped Glass

Abstract In this paper, by using the non-linear effects and also destructive and constructive interferences between waveguides, we have designed and simulated an all-optical full-Subtractor based on two-dimensional photonic crystals. The proposed Subtractor has a very simple structure which is composed of 33×31 silicon rods immersed in air in a square lattice and involves three input ports (bits) and an additional waveguide to exhaust the unwanted light. We imposed some defect rods to control the behavior of the light. The used non-linear material, is a doped glass with 1.4×10− 14 m2/w non-linear refractive index which is very greater than the non-linearity refractive index of silicon, 3.46×10− 20 m2/w. Since the proposed structure is very simple and compact, it can be applicable in optical integrated circuits and optical calculations.

Functional Devices in Photonic Crystals for Future Photonic Integrated Circuits

2010 ◽  
pp. 7–1-7–16
Author(s):  
A Shinya ◽  
T Tanabe ◽  
E Kutamochi ◽  
H Taniyama ◽  
S Kawanishi ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Integrated Circuits ◽  
Photonic Integrated Circuits

Design and Analysis of 3-Input NAND/NOR/XNOR Gate Based on 2D Photonic Crystals

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
K. Esakki Muthu ◽  
VN. Jannath Ul Firthouse ◽  
S. Sorna Deepa ◽  
A. Sivanantha Raja ◽  
S. Robinson
Keyword(s):  
Integrated Circuits ◽  
Gap Analysis ◽  
Photonic Integrated Circuits ◽  
Fdtd Method ◽  
Plane Wave Expansion ◽  
Square Cavity ◽  
Xnor Gate ◽  
All Optical ◽  
Line Defects ◽  
Difference Time

AbstractIn this paper, Two Dimensional (2D) Photonic Crystal (PhC) based 3-input all optical NOR, NAND and XNOR gates is proposed and designed. The proposed device is formed by the combination of line defects and square cavity. The performance of the device is analyzed using 2D Finite Difference Time Domain (FDTD) method. The band gap analysis is done by Plane Wave Expansion (PWE) method. The device has the lattice constant and refractive index of 616 nm and 3.46, respectively. The dimension of the proposed structure is about 12.5 µm*12 µm which is highly compact and suitable for photonic integrated circuits (PIC).

Compact four-port circulator based on 2D photonic crystals with a 90° rotation of the light wave for photonic integrated circuits applications

Laser Physics ◽  
2019 ◽  
Vol 29 (6) ◽  
pp. 066201 ◽  
Author(s):  
D Shanmuga Sundar ◽  
C Umamaheswari ◽  
T Sridarshini ◽  
Madurakavi Karthikeyan ◽  
R Sitharthan ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Integrated Circuits ◽  
Light Wave ◽  
Photonic Integrated Circuits

Investigation of Photonic Integrated Circuits with Low-Loss Bragg Gratings

2020 ◽  
Vol 41 (3) ◽  
pp. 229-233
Author(s):  
Manjinder Kaur ◽  
Sanjeev Dewra
Keyword(s):  
Integrated Circuits ◽  
Photonic Integrated Circuits ◽  
Optical Power ◽  
Grating Period ◽  
Bragg Reflector ◽  
Physical Parameters ◽  
Low Loss ◽  
Distributed Bragg Reflector ◽  
The Impact ◽  
Plasmon Polaritons

AbstractThe impact of physical parameters of uniform fiber Bragg grating (U-FBG) like grating period, length of grating, and width of grating on the performance of U-FBG fiber by using finite differences time domain (FDTD) based on surface plasmon polaritons (SPP) is evaluated. An FBG is similar to a distributed Bragg reflector created in a small segment of optical fiber that reflects some particular wavelengths of light and transmits the other wavelengths. It is observed that the maximum received optical power at the reflected port achieved is −1.67×10-6 w/m2 with silver (Ag) profile material of U-FBG at 0.1 w/m2 input transmission power and wavelength of 1.55 μm with 0.9 μm grating length and 0.2 μm grating width. The result shows that the received optical power is changing by optimizing the physical parameters of U-FBG.

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